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This is to ascertain that you can code using object oriented concepts and design patterns. A container is also a component note: The hierarchy diagram is shown below.

Interviewer will be looking for how passionate you are about your past experience and achievements. We need your help to maintenance this website.

Composite design pattern manipulates composite objects just like you manipulate individual components. For polymorphic interface inheritance, where the client wants to only deal with a type and does not care about the actual implementation use interfaces. What is the difference between an Interface and an Abstract class?

Components send events and listeners listen for events.

Arun Kumar _ Java 5_J2EE Interviews Questions and Answers

After weeks of constant interaction with the business owners, analysts and fellow developers, you had helped the business users to finalize the list of requirements. Firm handshake, maintain eye contact, smile, watch your body language, be pleasant, dress neatly and know the names of your interviewers and thank them by their names for the opportunity. Comparator interface API for further details.


An applet extend which class? What are the benefits of AOP? If it is in the pool, it will be picked up from the pool instead of creating a new one. In this model, the objects that receive user events notify the registered listeners of the user activity. So care should be taken not to break the implementing classes by modifying the interfaces. Serialization is the process of writing the state of an object to a byte stream.

In the following example the methods deposit … and withdraw … share the same piece of code in AccountHelper class. Identified and fixed some transactional issues for the Endeavor project, which is a hava based e-commerce application. This site is protected by wp-copyrightpro. Refer Q55 in Java section for generics. This approach adversely affects scalability of your application if it is highly concurrent. Socket class represents the socket that both the client and server use to communicate with each other.

You should not use assertion to check the parameters of the public methods but can use for the non-public methods. Many of the standard aeul in the Java library like String, Integer, Date, File etc implement the Comparable interface to give the class a “Natural Ordering”. Also shows that you have worked on transactional and multi-threaded arkl and have an eye for identifying potential failures.

Multiple views and controllers can interface with the same model. Can you call one constructor from another if a class has multiple constructors? The fully functional data packager was completed kimar 12 weeks and took only hours to package XML data for all the stores.

Arun Kumar _ Java 5_J2EE Interviews Questions and Answers – Free Download PDF

It also inherits all the default modifier methods and their implementation. Component class is the immediate super class.


String class as the key, which are immutable Java objects. Swing containment hierarchy using JPanels within JPanels and the painting process Top-level container paints itself First paints its solid grey background and then tells the JPanel to paint itself. An abstract class can have instance methods that implement a default behavior. Business tier provides the business services.

The success in the interviews did not come easily.

It is a best practice to implement the user defined key class as an immutable refer Q21 object. Why do we need wrapper classes? CO Generally you use a java. atul

Tell me about a difficult decision you made in the last year? If the user leaves the page and returns without killing the current browser session, the start method is called without being preceded by init. J2EE Java 2 Enterprise Edition is an environment for developing and deploying enterprise applications. Promote reuse without having to reinvent the wheel. The component makes no guarantees about whether or not its immediate children overlap Q The size is the number of elements actually stored in the vector, while capacity is the maximum number of elements it can store at a given instance of time.

Avoid where possible Better approach The code below is hard to maintain and understand by others.

What things should be kept in mind while creating jxva own exceptions in Java? It is also possible for programs to create objects that are not subject to garbage collection.